dorsal/arxiv
View SchemaQuantum versus Classical Domains for Teleportation with Continuous Variables
| Authors | Samuel L. Braunstein, Christopher A. Fuchs, H. J. Kimble, P. van Loock |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0012001 |
| URL | https://arxiv.org/abs/quant-ph/0012001 |
| DOI | 10.1103/PhysRevA.64.022321 |
Abstract
Fidelity F{classical} = 1/2 has been established as setting the boundary between classical and quantum domains in the teleportation of coherent states of the electromagnetic field (S. L. Braunstein, C. A. Fuchs, and H. J. Kimble, J. Mod. Opt. 47, 267 (2000)). Two recent papers by P. Grangier and F. Grosshans (quant-ph/0009079 and quant-ph/0010107) introduce alternate criteria for setting this boundary and as a result claim that the appropriate boundary should be F = 2/3. Although larger fidelities would lead to enhanced teleportation capabilities, we show that the new conditions of Grangier and Grosshans are largely unrelated to the questions of entanglement and Bell-inequality violations that they take to be their primary concern. With regard to the quantum-classical boundary, we demonstrate that fidelity F{classical} = 1/2 remains the appropriate point of demarcation. The claims of Grangier and Grosshans to the contrary are simply wrong, as we show by an analysis of the conditions for nonseparability (that complements our earlier treatment) and by explicit examples of Bell-inequality violations.
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"abstract": "Fidelity F{classical} = 1/2 has been established as setting the boundary\nbetween classical and quantum domains in the teleportation of coherent states\nof the electromagnetic field (S. L. Braunstein, C. A. Fuchs, and H. J. Kimble,\nJ. Mod. Opt. 47, 267 (2000)). Two recent papers by P. Grangier and F. Grosshans\n(quant-ph/0009079 and quant-ph/0010107) introduce alternate criteria for\nsetting this boundary and as a result claim that the appropriate boundary\nshould be F = 2/3. Although larger fidelities would lead to enhanced\nteleportation capabilities, we show that the new conditions of Grangier and\nGrosshans are largely unrelated to the questions of entanglement and\nBell-inequality violations that they take to be their primary concern. With\nregard to the quantum-classical boundary, we demonstrate that fidelity\nF{classical} = 1/2 remains the appropriate point of demarcation. The claims of\nGrangier and Grosshans to the contrary are simply wrong, as we show by an\nanalysis of the conditions for nonseparability (that complements our earlier\ntreatment) and by explicit examples of Bell-inequality violations.",
"arxiv_id": "quant-ph/0012001",
"authors": [
"Samuel L. Braunstein",
"Christopher A. Fuchs",
"H. J. Kimble",
"P. van Loock"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.64.022321",
"title": "Quantum versus Classical Domains for Teleportation with Continuous Variables",
"url": "https://arxiv.org/abs/quant-ph/0012001"
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